Comment # 12 on bug 1015998 from Fabian Vogt

(In reply to Michael from Offenbach Germany from comment #9)
> Hi Fabian,
> 
> of course I would like to help as much as I can to get this issue solved.
> But I'm not familiar with either "backtrace" or "kmozillahelper from
> mozilla:experimental". If you advice what and how to do, I certainly will do
> asap. 

Ok, to get a backtrace you'll need to open a terminal window (with two tabs)
and run

    gdb /usr/lib64/firefox/firefox -ex r -ex bt -ex q

in one and after firefox is started,

    gdb -p $(pidof kmozillahelper) -ex c -ex bt -ex q

in the other.
After you reproduced the crash, you'll find a backtrace in one of the outputs.
Copy it and paste them into a textfile and attach it here.

To get kmozillahelper from mozilla:experimental, run:

    zypper ar obs://mozilla:experimental/openSUSE_Leap_42.2 m:e
    zypper dup --from m:e
    <test here>
    zypper rr m:e
    zypper in --force mozilla-kde4-integration